Remove duplicated charset definitions

fpdfsdk/pdfwindow/PWL_EditCtrl.cpp

Index: fpdfsdk/pdfwindow/PWL_EditCtrl.cpp
diff --git a/fpdfsdk/pdfwindow/PWL_EditCtrl.cpp b/fpdfsdk/pdfwindow/PWL_EditCtrl.cpp
index 9d8b16a53c11618394a31f7f00faf27f61db282c..67e5f8bf9ff130895c6544a788c117fa34b90a5b 100644
--- a/fpdfsdk/pdfwindow/PWL_EditCtrl.cpp
+++ b/fpdfsdk/pdfwindow/PWL_EditCtrl.cpp
@@ -20,7 +20,7 @@ CPWL_EditCtrl::CPWL_EditCtrl()
     : m_pEdit(new CFX_Edit),
       m_pEditCaret(nullptr),
       m_bMouseDown(FALSE),
-      m_nCharSet(DEFAULT_CHARSET),
+      m_nCharSet(FXFONT_DEFAULT_CHARSET),
       m_nCodePage(0) {}
 
 CPWL_EditCtrl::~CPWL_EditCtrl() {}
@@ -476,7 +476,7 @@ void CPWL_EditCtrl::ShowVScrollBar(FX_BOOL bShow) {}
 
 void CPWL_EditCtrl::InsertText(const CFX_WideString& wsText) {
   if (!IsReadOnly())
-    m_pEdit->InsertText(wsText, DEFAULT_CHARSET);
+    m_pEdit->InsertText(wsText, FXFONT_DEFAULT_CHARSET);
 }
 
 void CPWL_EditCtrl::InsertWord(uint16_t word, int32_t nCharset) {
@@ -567,7 +567,7 @@ void CPWL_EditCtrl::IOnInvalidateRect(CFX_FloatRect* pRect) {
 }
 
 int32_t CPWL_EditCtrl::GetCharSet() const {
-  return m_nCharSet < 0 ? DEFAULT_CHARSET : m_nCharSet;
+  return m_nCharSet < 0 ? FXFONT_DEFAULT_CHARSET : m_nCharSet;
 }
 
 void CPWL_EditCtrl::GetTextRange(const CFX_FloatRect& rect,